title: Radially oriented anthracene nanowire arrays: preparation, growth mechanism, and optical fluorescence.
abstract: Radially oriented anthracene nanowires and their self-assembled concentric ring arrays were prepared through a facial solvent-evaporation method. The successful growth of anthracene nanowires can be attributed to a combined mechanism of molecular self-assembly facilitated by strong π-π intermolecular interactions together with evaporation-induced capillary flow and fingering instability. Their radial orientation is determined by the capillary flow; their shape (either straight or curved nanowires) is governed by the competition between the capillary and Marangoni convectional flows. The self-assembly of nanowires into large-scale concentric ring arrays can be interpreted in terms of the repeated slipping-and-sticking motions of the contact line. The high-quality crystalline anthracene nanowire arrays exhibit size-dependent fluorescence emission with high-degree anisotropy.
authors.affiliation: Department of Chemistry, National University of Singapore, 3 Science Drive 3, Republic of Singapore 117543.
authors.forename: Ji Hong
authors.initials: JH
authors.lastname: Wu
authors.forename: Tian Ze
authors.initials: TZ
authors.lastname: Xu
authors.forename: Siau Gek
authors.initials: SG
authors.lastname: Ang
authors.forename: Qing-Hua
authors.initials: QH
authors.lastname: Xu
authors.forename: Guo Qin
authors.initials: GQ
authors.lastname: Xu
mesh_terms: D016880:Anisotropy; D000873:Anthracenes / Q000737:chemistry*; D003460:Crystallization / Q000379:methods*; D005453:Fluorescence; D046911:Macromolecular Substances / Q000737:chemistry; D008422:Materials Testing; D008968:Molecular Conformation; D043942:Nanotubes / Q000737:chemistry* / Q000648:ultrastructure*; D010316:Particle Size; D012031:Refractometry; D013499:Surface Properties
chemical_list: D000873:Anthracenes; D046911:Macromolecular Substances; C034020:anthracene